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ArticleName Development and pilot testing of plasticized backfill mixtures in mines of the Polar Division of the Norilsk Nickel Mining and Metallurgical Company
DOI 10.17580/gzh.2019.11.04
ArticleAuthor Montyanova A. N., Trofimov A. V., Rumyantsev A. E., Vilchinskiy V. B.

Backfilling Technologies, Moscow, Russia:

A. N. Montyanova, Chief Executive Officer, Doctor of Engineering Sciences


Gipronickel Institute, Saint-Petersburg, Russia:
A. V. Trofimov, Head of Center for Physical and Mechanical Research, Candidate of Engineering Sciences,
A. E. Rumyantsev, Leading Researcher, Candidate of Engineering Sciences
V. B. Vilchinskiy, Head of Mining Laboratory, Candidate of Engineering Sciences


Technology of backfilling using cemented mixtures has no alternatives in mining of very high-value ore in difficult geological conditions, including rockburst-hazardous mines. Improving the composition of backfill is a very topical goal as the share of backfilling in the ore production cost makes 20–25 %. Reducing the cost of backfilling is achieved by using various types of cement-free binders, chemical additives and industrial wastes. The main goal was to reduce the cost of backfills produced in Talnakh mines of the Polar Division of Norilsk Nickel. It was allowed to include minimum corrections to the current technology of backfill preparation, to compositions of the mixtures and to productivity of mills. The cost reduction of backfills is achieved by the introduction of a chemical additive of technical lignosulfonate, which allows decreasing water consumption by 40–60 liters per one cubic meter of solid in the mixture with no change in its flowability and without its rheology deterioration. In turn, the optimized water : cement ratio makes it possible to increase the strength parameters, or, with a decrease in the binder consumption, to reach the specified strength parameters. The article presents the results of the lab tests and technological audit of backfilling plants. The pilot testing procedure and the method of feed of technical lignosulfonates in the process flow chart are described. The results of the lab tests and pilot tests of backfills with plasticized additives are compared. The pilot tests in Talnakh mines show reduction in Portland cement consumption by 25 % in the experimental slag and breakstone mixtures and by 10 % in compositions with anhydrite. Based on the positive results of the pilot industrial tests, the production procedures are developed for re-equipment of backfilling plants in Talnakh mines, and new compositions of plasticized backfills are recommended.

keywords Plasticizer, technical lignosulfonate, underground mining, backfilling plants, cemented backfill, backfilling technologies, filing mass

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